Insulator for high-tension transmission systems.



J. NOEGGERATIL INSULATOR FOR HIGH TENSION TRANSMISSION SYSTEMS.

APPLICATION FILED T111311, 1910.

Patented Nov. 1,1910.

gerath,

Z SHEETSSHEET l,

Inventor":

JaKobElNoe Witnesses:

J, E. NOEGGERATH. INSULATOR FOR HIGH TENSION TRANSMISSION SYSTEMS. APPLICATION FILED Mme; 1910. 974 171 Patented N0v.1,1910.

2 SHEETSSHEET 2.

as a o a a 'i .Jakab Nmagderath w v duccd' bv connecting it in series with other an insulating unit which, in addition to posaffecting or impairing the-electrical proper- :To all whom it m concern: Y

' ing towers for the conductor. wireslper. mile- .cal axial sections of an insulating'unit ii which the anchoring balls for the boltare .srairEs PATENT OFFICE.

mm n. noneenaa'rn. or scnnnnc'rany, NEW YoRK, .as'smnon TO eEivERA'L ELnc'rarc COMPANY,-A CORPORATION on NEW YORK.

. Be it known that- I,JAKB E. Noroosna'rn, a citizen of theUnited States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful Improvements in Insulators for High-Tension Transmission Systems, of which the following is a specification.

lhepresent invention relates to electrical insulators andmore especially to insulating units for high tension power circuits.

In the transmission of electrical power. over considerable distances, economy ofcon: struction necessitates that the current be at high tension, often above one hundred thousand volts, and that the number of supportbe few. As'a'result of these practical requircmcnts, the insulators for the conductor wires have imposed upon them the double function oil-withstanding the high potential current and the great mechanical strains due. to the weight and tension of the long spans of wire. it has been the practice during recent years to employ chains of insulating units of moderate size rather than single large insulators on high potential circuits so as to subdivide the potential differences imposed upon the respective units, but the mechanieal stresses on a unit are in no way reinsulators.

The objectof my invention is to provide sessing high electrical properties. will withstandexcessi'vc mechanical stresses withou ties an which inay be manufactured. at moderate cost. My invention may be embodied in vari-. ous ways, some. of which are indicated in the accompanying drawing forming a part of this specification, in which- 1 'Figure l is a vertical axial section of an insulating unit in'which the anchoring balls for the bolt are inserted through a channel formed in the insulating member; Fig. 2 is a. horizontal section on line 2 -2 of Fig. 1, showing method of, anchoring, insulating member to the bell; Figs; 3-and4 are vertiin'serted prior to-the introduction of the bolt head; Fig. 5 is a vertical axial section of an insulating unit in which the anchoring bells Specification .0! Letters Patent. Appltcatton flled February S, 1910. 'Serial no. 542,862. 7

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Patented Nov. 1,1910.

for the bolt are inserted through a channel formed at the axis of the bolt and the bell anchored to. the insulating member by balls; Fig. 6 is a vertical axial section of an insulating unit with two insulating members and all parts anchored similar to the construction shown in Figs. 1 and 2; and Figs. 7 and 8 show modified forms of balls drawn .to enlarged scale.

In all of the constructions shown in the drawings, the. insulating unit comprises an upper strain member in the form of a supporting bell 1, one or more insulating menibers2 and a lower strain member in the form of a bolt 3.

The bell 1 is preferably of cast iron and provided with an internal groovel near i s"- lower end, and at. its upper end with a liolding projection 5 in whiehis formed a re-.

cess 6 for receiving theend of a strainbolt, 3 of an upper insulating unit (not shown)l The insulating member 2 is preferably of porcelain with its main portion 7 made in the-form of a flaring disk, and its upper central section Sin the form of a c ,'lindrical knob with a peripheral groove S) near its base and a'central-cavity 1O enlarged at its inner end to form a circular inclined shoulder or ledge 11 at a distance from the mouth of the cavity,-

The strain bolt 3 is of round m'achine steel or wrought iron with a circular head 12 at each end and a ball retaining flange 13 some distance below the upper head. it

.isf a'nelroredin the central cavity of the lnsulatmgmcmbcr by metal slugs or balls 151;, which, when forced into lntlll'litltl'ctlllliltjli with the- -insulating material, wi ll COl'll press somewhz't'and distribute the pressure in stead otoperating to crush theinsulation. The slugsor balls may be entirely of brass or copper, or as shown in. Fig. 7 of a hard metal 14 coated with -a -more vyicldablc metal, or'as shown'in-Fig. S of a hard metal provided with protubcrances which afford a number of points'of contact.

In the construction shown'in Figsl and 2,.the insulating member has a channel 15 formed in the wall of the-lower or contraeted portion of the cavity-=10, and the bolt flange 13 is cut away at 16 so that after the end of the bolt has been inserted in the cavity the anchoring halls'14 may be passed throu' h the channel to the space between the inner side of the bolt head 12 and the too ' ledge 11 of the insulator where they are automatically distributed by the crowdin in of the necessary number. By iving the alt i a partial turn the cutout section of the bolt 1 tied without, departing from my invention.

iii

flange 13, is carried out of register with the insulator channel and serves to: lock the halls in place. The insulating member 2'is' anchored to the boil 1 byineans of a wire 17, which may be cut in sections, inserted through a tangential hole 18 cut in the rim of the bell and forced around in the space formed by the complementarygrooves 4: and 9. v

In the construction shown' in Figs. 3 and 4, the center bolt 3 has a depressed upper end and a diagonal slot 19 cut in its head extending from the depression to the space between the under surface of the head and r the retaining flange 13. In assembling the parts the required number of balls 14 are introduced. into the cavity ldbefore the insertion of the bolt head, and then by slight manipulation ofthe bolt they are caused to pass through the slot 19 to space between the lower surface of the bolt head and the ledge 11 on the insulatingmembcr.

In the construction shown im 1 1g. 5,the bolt 3 is providedwith a central bore extending from the lower end to near the upf per end where it turns and emerges just below the head. The anchoring balls 14 are passed through the bore 20 and distribute themselves between the ledge 11 and .bolt head 12 as in'each of'the precedin cases. The insulating member 2 is anchored in the hell 1 bya number of balls 17 introduced into the space formed by the complementary grooves 4 and 9 through a hole 18 in the lower end of the bell.

In the cpnstruction shown in Fig. 6, there 1 are two insulating members 2 and 2 with within the cavity 10 of the former byslugs Q v I 974,17;

I do not desire to restrict myself to the particular form or arrangement of parts herein shown and described, since it is a)- parent that they may be changed and mo isure imposed upon the insulator by said strain member. r

Thecombination with an insulator having an internal shoiflder, of a strain bolt having a head disposed in proximity to said shoulder, and anchor slugs disposed between said shoulder and the head of said bolt.

3. 'lhecombinatiou with an insulator having a shouldered cavity, a strain bolt having a head disposed within said cavity; and an chor slugs disposed between the outer side of said bolt head and the shoulder of said i cavity. i

-.l. The combination with an insulator having activity enlarged at its inner end to ifOllll an internal.shoulder and provided with a groove in the wall of the outer portionof the cavity or a strain bolt having a head disposed in the enlarged portion of said cavity, and anchor slugs insertibie through said groove into the space between the outer surface of said bolt head and the shoulder of said cavity.

5. The combination with an insulator having a peripheral shoulder. of a supporting bell surrounding the grooved portion of the insulator and provided with an internal complementary shoulden and an anchor wire disposed in the space between said shoulders.

(3. The combination with an insulator haw ling a circular portion provided with a pcthe knob portion 8 of the latter anchored and the bolt 3 is anchored in the insulating member 2 in the same manner as'in the form of device shown in Figs. 1 and 2.

tion and to exclude moisture, I fill the un-" rounding the: shouldered portion of the inp L sulaton'and cement filling the unoccupied the insulating unit with suitable cement or Q occupied spaces between the several parts of ripheral groove. of a supporting bell surrounding said circular portion of the insu- ,or balls 14 introduced through complemen-f lator and provided with a groove oppositethe insulator groove and with an aperture tangential to said groove.

7. The combinatmn with an insulator hav- 3 in; an internal shoulder. of a sirain bolt having a head disposer. in proximity to said Qshouldcr, anchor slugs between said shoulln order to retain the parts in fixed rcla- I 7 other self hardening substance 521; It

strains and that the cement 'is substantially passive in this respect.

der and bolthead, a FllLillt'll'illlQ' bell sur-.

spaces between said parts.

in witness whereof. I have hereunto set i my haiid this 7th day of Februarv. 1910. anchoring means resist the tendency of the JAKOB E. NO'EGGl lR-ATH. \Vitnesses HELEN ORFORLL BENJAMIN B. llunr. 

